VTMO 2026 - Grade 7 - Semifinal - SET 7 - Self-study Question 14

VTMO · VTMO 2026 - Grade 7 - Semifinal - SET 7 - Self-study

Question 14

Evaluate $1\cdot2-2\cdot3+3\cdot4-\cdots-48\cdot49+49\cdot50$.

1. −1200
2. −625
3. 625
4. 1225
5. 1250